My family (on my father's side) immigrated to the US in the 1938, fleeing Nazi Germany. They were from Berlin and had the rather typical German name of Weinberger. Upon arriving in the US, they decided to remake themselves into Americans, and made up the name Wintory (because apparently that sounded American to them).

In other words, the name is 100% made up. My father and his siblings were the first family members actually with the name. I am part of the second generation of Wintorys. The other funny side effect is that anyone named Wintory you ever meet will be a part of family.